With Natalie I didn't feel anything really until about 19 weeks. With this one it was about 16 weeks. The interesting thing I found last time was that I first felt strange indistinct movements, then after a few weeks it was kicks and hiccups and shoves, then by the end you could tell she was running out of room - she just rolled her bum back and forth
All good fun. I'm looking forward to feeling what this one's going to do. Enjoy!